mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-28 18:32:22 +00:00
25c8507818
Also remove other unnecessary headers and include headers directly while at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
296 lines
13 KiB
C
296 lines
13 KiB
C
/*
|
|
* AC-3 encoder & E-AC-3 encoder common header
|
|
* Copyright (c) 2000 Fabrice Bellard
|
|
* Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* AC-3 encoder & E-AC-3 encoder common header
|
|
*/
|
|
|
|
#ifndef AVCODEC_AC3ENC_H
|
|
#define AVCODEC_AC3ENC_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/opt.h"
|
|
#include "ac3.h"
|
|
#include "ac3dsp.h"
|
|
#include "avcodec.h"
|
|
#include "fft.h"
|
|
#include "mathops.h"
|
|
#include "me_cmp.h"
|
|
#include "put_bits.h"
|
|
#include "audiodsp.h"
|
|
|
|
#ifndef AC3ENC_FLOAT
|
|
#define AC3ENC_FLOAT 0
|
|
#endif
|
|
|
|
#if AC3ENC_FLOAT
|
|
#include "libavutil/float_dsp.h"
|
|
#define AC3_NAME(x) ff_ac3_float_ ## x
|
|
#define MAC_COEF(d,a,b) ((d)+=(a)*(b))
|
|
#define COEF_MIN (-16777215.0/16777216.0)
|
|
#define COEF_MAX ( 16777215.0/16777216.0)
|
|
#define NEW_CPL_COORD_THRESHOLD 0.03
|
|
typedef float SampleType;
|
|
typedef float CoefType;
|
|
typedef float CoefSumType;
|
|
#else
|
|
#include "libavutil/fixed_dsp.h"
|
|
#define AC3_NAME(x) ff_ac3_fixed_ ## x
|
|
#define MAC_COEF(d,a,b) MAC64(d,a,b)
|
|
#define COEF_MIN -16777215
|
|
#define COEF_MAX 16777215
|
|
#define NEW_CPL_COORD_THRESHOLD 503317
|
|
typedef int32_t SampleType;
|
|
typedef int32_t CoefType;
|
|
typedef int64_t CoefSumType;
|
|
#endif
|
|
|
|
/* common option values */
|
|
#define AC3ENC_OPT_NONE -1
|
|
#define AC3ENC_OPT_AUTO -1
|
|
#define AC3ENC_OPT_OFF 0
|
|
#define AC3ENC_OPT_ON 1
|
|
#define AC3ENC_OPT_NOT_INDICATED 0
|
|
#define AC3ENC_OPT_MODE_ON 2
|
|
#define AC3ENC_OPT_MODE_OFF 1
|
|
#define AC3ENC_OPT_DSUREX_DPLIIZ 3
|
|
|
|
/* specific option values */
|
|
#define AC3ENC_OPT_LARGE_ROOM 1
|
|
#define AC3ENC_OPT_SMALL_ROOM 2
|
|
#define AC3ENC_OPT_DOWNMIX_LTRT 1
|
|
#define AC3ENC_OPT_DOWNMIX_LORO 2
|
|
#define AC3ENC_OPT_DOWNMIX_DPLII 3 // reserved value in A/52, but used by encoders to indicate DPL2
|
|
#define AC3ENC_OPT_ADCONV_STANDARD 0
|
|
#define AC3ENC_OPT_ADCONV_HDCD 1
|
|
|
|
|
|
/**
|
|
* Encoding Options used by AVOption.
|
|
*/
|
|
typedef struct AC3EncOptions {
|
|
/* AC-3 metadata options*/
|
|
int dialogue_level;
|
|
int bitstream_mode;
|
|
float center_mix_level;
|
|
float surround_mix_level;
|
|
int dolby_surround_mode;
|
|
int audio_production_info;
|
|
int mixing_level;
|
|
int room_type;
|
|
int copyright;
|
|
int original;
|
|
int extended_bsi_1;
|
|
int preferred_stereo_downmix;
|
|
float ltrt_center_mix_level;
|
|
float ltrt_surround_mix_level;
|
|
float loro_center_mix_level;
|
|
float loro_surround_mix_level;
|
|
int extended_bsi_2;
|
|
int dolby_surround_ex_mode;
|
|
int dolby_headphone_mode;
|
|
int ad_converter_type;
|
|
int eac3_mixing_metadata;
|
|
int eac3_info_metadata;
|
|
|
|
/* other encoding options */
|
|
int allow_per_frame_metadata;
|
|
int stereo_rematrixing;
|
|
int channel_coupling;
|
|
int cpl_start;
|
|
} AC3EncOptions;
|
|
|
|
/**
|
|
* Data for a single audio block.
|
|
*/
|
|
typedef struct AC3Block {
|
|
CoefType **mdct_coef; ///< MDCT coefficients
|
|
int32_t **fixed_coef; ///< fixed-point MDCT coefficients
|
|
uint8_t **exp; ///< original exponents
|
|
uint8_t **grouped_exp; ///< grouped exponents
|
|
int16_t **psd; ///< psd per frequency bin
|
|
int16_t **band_psd; ///< psd per critical band
|
|
int16_t **mask; ///< masking curve
|
|
uint16_t **qmant; ///< quantized mantissas
|
|
uint8_t **cpl_coord_exp; ///< coupling coord exponents (cplcoexp)
|
|
uint8_t **cpl_coord_mant; ///< coupling coord mantissas (cplcomant)
|
|
uint8_t new_rematrixing_strategy; ///< send new rematrixing flags in this block
|
|
int num_rematrixing_bands; ///< number of rematrixing bands
|
|
uint8_t rematrixing_flags[4]; ///< rematrixing flags
|
|
int new_cpl_strategy; ///< send new coupling strategy
|
|
int cpl_in_use; ///< coupling in use for this block (cplinu)
|
|
uint8_t channel_in_cpl[AC3_MAX_CHANNELS]; ///< channel in coupling (chincpl)
|
|
int num_cpl_channels; ///< number of channels in coupling
|
|
uint8_t new_cpl_coords[AC3_MAX_CHANNELS]; ///< send new coupling coordinates (cplcoe)
|
|
uint8_t cpl_master_exp[AC3_MAX_CHANNELS]; ///< coupling coord master exponents (mstrcplco)
|
|
int new_snr_offsets; ///< send new SNR offsets
|
|
int new_cpl_leak; ///< send new coupling leak info
|
|
int end_freq[AC3_MAX_CHANNELS]; ///< end frequency bin (endmant)
|
|
} AC3Block;
|
|
|
|
/**
|
|
* AC-3 encoder private context.
|
|
*/
|
|
typedef struct AC3EncodeContext {
|
|
AVClass *av_class; ///< AVClass used for AVOption
|
|
AC3EncOptions options; ///< encoding options
|
|
AVCodecContext *avctx; ///< parent AVCodecContext
|
|
PutBitContext pb; ///< bitstream writer context
|
|
AudioDSPContext adsp;
|
|
#if AC3ENC_FLOAT
|
|
AVFloatDSPContext *fdsp;
|
|
#else
|
|
AVFixedDSPContext *fdsp;
|
|
#endif
|
|
MECmpContext mecc;
|
|
AC3DSPContext ac3dsp; ///< AC-3 optimized functions
|
|
FFTContext mdct; ///< FFT context for MDCT calculation
|
|
const SampleType *mdct_window; ///< MDCT window function array
|
|
|
|
AC3Block blocks[AC3_MAX_BLOCKS]; ///< per-block info
|
|
|
|
int fixed_point; ///< indicates if fixed-point encoder is being used
|
|
int eac3; ///< indicates if this is E-AC-3 vs. AC-3
|
|
int bitstream_id; ///< bitstream id (bsid)
|
|
int bitstream_mode; ///< bitstream mode (bsmod)
|
|
|
|
int bit_rate; ///< target bit rate, in bits-per-second
|
|
int sample_rate; ///< sampling frequency, in Hz
|
|
|
|
int num_blks_code; ///< number of blocks code (numblkscod)
|
|
int num_blocks; ///< number of blocks per frame
|
|
int frame_size_min; ///< minimum frame size in case rounding is necessary
|
|
int frame_size; ///< current frame size in bytes
|
|
int frame_size_code; ///< frame size code (frmsizecod)
|
|
uint16_t crc_inv[2];
|
|
int64_t bits_written; ///< bit count (used to avg. bitrate)
|
|
int64_t samples_written; ///< sample count (used to avg. bitrate)
|
|
|
|
int fbw_channels; ///< number of full-bandwidth channels (nfchans)
|
|
int channels; ///< total number of channels (nchans)
|
|
int lfe_on; ///< indicates if there is an LFE channel (lfeon)
|
|
int lfe_channel; ///< channel index of the LFE channel
|
|
int has_center; ///< indicates if there is a center channel
|
|
int has_surround; ///< indicates if there are one or more surround channels
|
|
int channel_mode; ///< channel mode (acmod)
|
|
const uint8_t *channel_map; ///< channel map used to reorder channels
|
|
|
|
int center_mix_level; ///< center mix level code
|
|
int surround_mix_level; ///< surround mix level code
|
|
int ltrt_center_mix_level; ///< Lt/Rt center mix level code
|
|
int ltrt_surround_mix_level; ///< Lt/Rt surround mix level code
|
|
int loro_center_mix_level; ///< Lo/Ro center mix level code
|
|
int loro_surround_mix_level; ///< Lo/Ro surround mix level code
|
|
|
|
int cutoff; ///< user-specified cutoff frequency, in Hz
|
|
int bandwidth_code; ///< bandwidth code (0 to 60) (chbwcod)
|
|
int start_freq[AC3_MAX_CHANNELS]; ///< start frequency bin (strtmant)
|
|
int cpl_end_freq; ///< coupling channel end frequency bin
|
|
|
|
int cpl_on; ///< coupling turned on for this frame
|
|
int cpl_enabled; ///< coupling enabled for all frames
|
|
int num_cpl_subbands; ///< number of coupling subbands (ncplsubnd)
|
|
int num_cpl_bands; ///< number of coupling bands (ncplbnd)
|
|
uint8_t cpl_band_sizes[AC3_MAX_CPL_BANDS]; ///< number of coeffs in each coupling band
|
|
|
|
int rematrixing_enabled; ///< stereo rematrixing enabled
|
|
|
|
/* bitrate allocation control */
|
|
int slow_gain_code; ///< slow gain code (sgaincod)
|
|
int slow_decay_code; ///< slow decay code (sdcycod)
|
|
int fast_decay_code; ///< fast decay code (fdcycod)
|
|
int db_per_bit_code; ///< dB/bit code (dbpbcod)
|
|
int floor_code; ///< floor code (floorcod)
|
|
AC3BitAllocParameters bit_alloc; ///< bit allocation parameters
|
|
int coarse_snr_offset; ///< coarse SNR offsets (csnroffst)
|
|
int fast_gain_code[AC3_MAX_CHANNELS]; ///< fast gain codes (signal-to-mask ratio) (fgaincod)
|
|
int fine_snr_offset[AC3_MAX_CHANNELS]; ///< fine SNR offsets (fsnroffst)
|
|
int frame_bits_fixed; ///< number of non-coefficient bits for fixed parameters
|
|
int frame_bits; ///< all frame bits except exponents and mantissas
|
|
int exponent_bits; ///< number of bits used for exponents
|
|
|
|
SampleType *windowed_samples;
|
|
SampleType **planar_samples;
|
|
uint8_t *bap_buffer;
|
|
uint8_t *bap1_buffer;
|
|
CoefType *mdct_coef_buffer;
|
|
int32_t *fixed_coef_buffer;
|
|
uint8_t *exp_buffer;
|
|
uint8_t *grouped_exp_buffer;
|
|
int16_t *psd_buffer;
|
|
int16_t *band_psd_buffer;
|
|
int16_t *mask_buffer;
|
|
int16_t *qmant_buffer;
|
|
uint8_t *cpl_coord_exp_buffer;
|
|
uint8_t *cpl_coord_mant_buffer;
|
|
|
|
uint8_t exp_strategy[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< exponent strategies
|
|
uint8_t frame_exp_strategy[AC3_MAX_CHANNELS]; ///< frame exp strategy index
|
|
int use_frame_exp_strategy; ///< indicates use of frame exp strategy
|
|
uint8_t exp_ref_block[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< reference blocks for EXP_REUSE
|
|
uint8_t *ref_bap [AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< bit allocation pointers (bap)
|
|
int ref_bap_set; ///< indicates if ref_bap pointers have been set
|
|
|
|
int warned_alternate_bitstream;
|
|
|
|
/* fixed vs. float function pointers */
|
|
void (*mdct_end)(struct AC3EncodeContext *s);
|
|
int (*mdct_init)(struct AC3EncodeContext *s);
|
|
|
|
/* fixed vs. float templated function pointers */
|
|
int (*allocate_sample_buffers)(struct AC3EncodeContext *s);
|
|
|
|
/* AC-3 vs. E-AC-3 function pointers */
|
|
void (*output_frame_header)(struct AC3EncodeContext *s);
|
|
} AC3EncodeContext;
|
|
|
|
|
|
extern const uint64_t ff_ac3_channel_layouts[19];
|
|
extern const AVOption ff_ac3_enc_options[];
|
|
extern const AVClass ff_ac3enc_class;
|
|
extern const AVCodecDefault ff_ac3_enc_defaults[];
|
|
|
|
int ff_ac3_encode_init(AVCodecContext *avctx);
|
|
int ff_ac3_float_encode_init(AVCodecContext *avctx);
|
|
|
|
int ff_ac3_encode_close(AVCodecContext *avctx);
|
|
|
|
int ff_ac3_validate_metadata(AC3EncodeContext *s);
|
|
|
|
void ff_ac3_adjust_frame_size(AC3EncodeContext *s);
|
|
|
|
void ff_ac3_compute_coupling_strategy(AC3EncodeContext *s);
|
|
|
|
int ff_ac3_encode_frame_common_end(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr);
|
|
|
|
/* prototypes for functions in ac3enc_template.c */
|
|
|
|
int ff_ac3_fixed_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr);
|
|
int ff_ac3_float_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr);
|
|
|
|
#endif /* AVCODEC_AC3ENC_H */
|